Tribulus 625 is a supplement made from top-quality Tribulus Terrestris. Long used in Indian ayurvedic practice to increase male sex drive, Tribulus is a source of furastanol saponins, sterols, and flavonoids. These compounds are thought to enhance the production of luteinizing hormone, which controls the development of testosterone. Recent research in a variety of animals, including primates, found that Tribulus Terrestris increased testosterone and dihydrotestosterone levels as much as 50%. Independent reports indicate that an extract of Tribulus Terrestris has the ability to increase hormone levels while leaving them within a normal range. In addition to boosting libido and sexual performance, Tribulus Terrestris has also been used for decades by athletes to enhance their performance in sports.